Consistency makes life easy. Imagine trying to run up a flight of stairs when each step was a different height. Imagine trying to find a page in a book when each page number was in a different font or in a different location on the page. Imagine building a train for tracks that were all different widths. In short, imagine inconsistencies. They’re no fun—not when you’ve got places to go. Now imagine a website where some links look like this, others look like THIS, and still others look like this. And there is no other difference between them. It’s not that some of them are in the navigation and some of them are in paragraphs like this; they’re all just in paragraphs like this and they all have the same function. That’d be confusing, right? And it’s hard to have fun when you’re confused, right? Right. If some of your links have hover states and others don’t, then you’d better be ready to answer to The Consistency Police. If two things look like ducks, but one quacks like a chicken, that's bad.